CVE-2020-36033 in Water Billing System
Summary
by MITRE • 07/23/2021
SQL injection vulnerability in SourceCodester Water Billing System 1.0 via the id parameter to edituser.php.
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Analysis
by VulDB Data Team • 07/27/2021
The CVE-2020-36033 vulnerability represents a critical sql injection flaw within the SourceCodester Water Billing System version 1.0, specifically targeting the edituser.php script through the id parameter. This vulnerability falls under the common weakness enumeration CWE-89 which categorizes sql injection as a serious security flaw that allows attackers to manipulate database queries through malicious input. The affected system processes user input directly without proper sanitization or parameterization, creating an exploitable entry point for malicious actors to execute arbitrary sql commands against the underlying database infrastructure. The vulnerability specifically manifests when the application accepts the id parameter from the edituser.php endpoint without adequate validation or escaping mechanisms.
The technical exploitation of this vulnerability enables an attacker to inject malicious sql payloads through the id parameter, potentially allowing full database access and control over the water billing system's user management functionality. When the application processes the id parameter in the edituser.php script, it constructs sql queries that incorporate user-supplied input directly into the database command execution flow. This design flaw permits attackers to manipulate the intended sql query structure by appending malicious sql syntax, potentially leading to unauthorized data retrieval, modification, or deletion operations. The vulnerability demonstrates poor input handling practices and violates fundamental security principles of input validation and parameterized queries.
The operational impact of CVE-2020-36033 extends beyond simple data theft, as it provides attackers with the capability to escalate privileges within the water billing system. An attacker could potentially extract sensitive user credentials, billing information, personal data, and system configuration details stored in the database. The vulnerability also enables unauthorized modification of user accounts, allowing attackers to gain administrative privileges or create backdoor access points within the system. This sql injection flaw compromises the integrity and confidentiality of the entire water billing database, potentially affecting thousands of users and their personal information. The attack surface is particularly concerning given that the vulnerability exists in a billing system that likely contains sensitive financial and personal data.
Mitigation strategies for CVE-2020-36033 require immediate implementation of proper input validation and parameterized query execution throughout the application codebase. Organizations should deploy prepared statement implementations using parameterized queries to prevent sql injection attacks, ensuring that all user inputs are properly escaped or validated before database interaction. The system administrators must conduct comprehensive code reviews to identify and remediate similar vulnerabilities across other endpoints and scripts within the water billing application. Additionally, implementing web application firewalls and input filtering mechanisms can provide additional layers of protection against sql injection attempts. The vulnerability highlights the importance of following secure coding practices as outlined in the owasp top ten and mitre attack framework, specifically addressing the sql injection techniques categorized under attack phase 3 of the kill chain where adversaries attempt to exploit vulnerabilities for data exfiltration and system compromise. Regular security assessments and vulnerability scanning should be implemented to prevent similar issues in future releases of the software.